I was wondering what kinds of things Toa would be capable of if they kept their power indefinitely. Most of the Toa we saw in the story were novices, with the Metru having their power for at most a month before sacrificing it, and the Nuva/Mahri had only been active for about a year.

On the other hand, Lhikan, who spent millennia as a Toa, was able to detect heat sources and even draw heat out of water and turn it into ice. Then there's Helryx, who pretty much effortlessly held a tidal wave in place while having a conversation.

So if a Toa were to keep going on and on, just how powerful could they get? Is there a limit to what they'd be able to do with their elements?